We look at the division of 864650 by 25 
The aim is to understand the frequency of 25 in 864650.

Moving on to step 1:
8 divided by 25 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 25

Advancing to step 2:
25 can be fit into 86 3 times, resulting in a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 75 from 86, we get 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 25

Moving on to step 3:
The number 25 fits into 114 4 times, leaving a remainder of 14.
The next digit of our result is 4. 
Result so far: 34.0
If we subtract 100 from 114, we get 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 25

Advancing to step 4:
25 goes into 146 5 times with a remainder of 21.
The next digit of our result is 5. 
Result so far: 345.0
Subtract 125 from 146 to get 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 25

Moving on to step 5:
25 goes into 215 8 times with a remainder of 15.
Use 8 as the next digit of our solution. 
Result so far: 3458.0
If we take 200 away from 215, we end up with 15.
Grab the next digit (0) from the dividend, add it to 15, then carry on: 150 / 25

Let's proceed to step 6:
When dividing 150 by 25, we get 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 34586.0
Subtracting 150 from 150 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
0 divided by 25 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 34586.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 34586.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 34586.0 and a remainder of 0.0.